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Moiré Materials Magic

Date and Time: Wednesday, October 28, 2020, 03:30pm - 04:30pm

Speaker: Allan H. MacDonald, University of Texas, Austin 

Abstract: Moiré pattern are ubiquitous in van der Waals materials and can now be fabricated with considerable control to realize artificial two-dimensional crystals in which the number of electrons per effective atom can be varied over a substantial range.  I will survey some of the moiré material systems currently under study, and some of the materials physics that can potentially be simulated in this new context.  I will focus a part of my presentation on the special and interesting case of magic-angle twisted bilayer graphene, in which very slow electrons can be superconductors, two-dimensional metals, or Chern insulators, depending sensitively on band filling, moiré twist angle, and the proximity of nearby electrical gates. 

Host: Sang-Wook Cheong/Piers Coleman 


Extra Info: Meeting ID: 977 4752 4523 Password: 817908